How many days do I need to hatch eggs

It takes 15 days to hatch eggs.This bird is generally alone when breeding, and it will be paired after pairing, and it will be in groups when not breeding.The breeding time is generally from May to July. After entering the breeding place, the birds will be called for a puppet. Find the other half to camp, and its nests are mostly on the tree salamander.Usually each nest can produce 3-7 eggs, but most of the time is 4 or 5.